创建服务

nano /etc/systemd/system/myshsh.service

[Unit]
Description=Add a short description

[Service]
User=root
ExecStart=your command
KillMode=process

创建定时器

nano /etc/systemd/system/mysh.timer

[Unit]
Description=Add a short description

[Timer]
OnBootSec=5min
OnUnitActiveSec=30min
Unit=mysh.service

[Install]
WantedBy=timers.target

运行并设置开机自动运行

systemctl enable --now mysh.timer

重新载入

systemctl daemon-reload

停止计时器并关闭开机自动运行

systemctl disable --now mysh.timer
systemctl daemon-reload